Lesser Snow Geese and Ross's Geese form mixed flocks during winter but differ in family maintenance and social status

@inproceedings{Jnsson2008LesserSG,
  title={Lesser Snow Geese and Ross's Geese form mixed flocks during winter but differ in family maintenance and social status},
  author={J{\'o}n Einar J{\'o}nsson and Alan D. Afton},
  year={2008}
}
Abstract Smaller species are less likely to maintain families (or other forms of social groups) than larger species and are more likely to be displaced in competition with larger species. We observed mixed-species flocks of geese in southwest Louisiana and compared frequencies of social groups and success in social encounters of Lesser Snow Geese (Chen caerulescens caerulescens; hereafter Snow Geese) with that of the smaller, closely-related Ross's Geese (C. rossii). Less than 7% of adult and… Expand
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Methods Citations
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10 Citations

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Time budgets of Snow Geese Chen caerulescens and Ross's Geese Chen rossii in mixed flocks: implications of body size, ambient temperature and family associations
TLDR
It is concluded that body size is a key variable influencing time spentfeeding in Ross's Geese, which may require a high time spent feeding at the expense of other activities. Expand
Fitness heterogeneity in adult Snow and Ross's geese: Survival is higher in females with brood patches
TLDR
It is found that females of each species with a brood patch had consistently higher probabilities of survival than those without, subsequent to capture in early August, consistent with the concept of variable individual quality impacting vital rates across multiple seasons. Expand
Family size dynamics in wintering geese
AbstractMany bird populations are made up of social units with differences in size and social status. Of these, the family and flock structure of geese Anserini are among the better known. However,… Expand
Movements and survival of Lesser Snow Geese Chen caerulescens caerulescens wintering in two habitats along the Gulf Coast, Louisiana
Lesser Snow Geese Chen caerulescens caerulescens (hereafter Snow Geese) use two wintering habitats in southwest Louisiana. Snow Geese in coastal marshes generally have larger bodies and… Expand
Do foraging methods in winter affect morphology during growth in juvenile snow geese?
TLDR
It is found that bill and skull bones of juveniles grew similarly between habitats, thus failing to support the exertion hypothesis, and further research is needed to clarify whether snow geese wintering in Louisiana represent a single polymorphic population that segregates into individually preferred habitats. Expand
A longitudinal study of dominance and aggression in greylag geese (Anser anser)
TLDR
It is indicated that optimal choices for achieving or maintaining a high dominance rank may vary considerably between life-history stages, and this highlights the value of long-term studies and multifactorial approaches for understanding the complexities of dominance relationships in social vertebrates. Expand
Experimental test for a trade-off between successful nesting and survival in capital breeders with precocial offspring
TLDR
A general negative effect of successful nesting on survival is detected, whereby point estimates of annual survival for successfully nesting females were consistently lower than those for failed nesters. Expand
Experimental Evidence Shows the Importance of Behavioural Plasticity and Body Size under Competition in Waterfowl
TLDR
It is suggested that variation in peck rate over different swards height permits Anatidae herbivores to compensate for the loss of intake under competition, illustrating the importance of behavioural plasticity in heterogeneous environments when competing with other species for resources. Expand
Coordination and Synchronisation of Anti-Predation Vigilance in Two Crane Species
TLDR
Investigation of temporal sequences of vigilance in family flocks consisting of two parents and at most two juveniles in two species of cranes in coastal China established whether the observed probability that at least one parent is alert was greater or lower than that predicted under the null hypothesis of independent vigilance. Expand
Do Siskins have friends? An analysis of movements of Siskins in groups based on EURING recoveries
TLDR
Analysis of ring recovery data of Siskins from the EURING database suggests that Sisks have stable social bonds and move in stable social units. Expand

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